Oh, yeah, that rebuts his argument!
Retool to be what? More advanced versions of themselves? Plumbers? Construction workers?
Why not?
Mother of God!!! These are people whose skills are already up to date.
And practically worthless in today's market glut. You can't change the law of supply and demand.
They can only retool into blue collar professions.
You say that like it's a bad thing! But still, it's wrong.
No, you can't. You can, however, replace the RATIO of supply to demand. It's easy, it's called "passing laws".